I understand. I did not know that is not supported by BitFunder. Maybe we can ask exchange owner Ukyo to take a look into this and make some changes? I know it's a long shot but if we can get this implemented where only sold shares would get dividends it would be great.
Yes. That would be the best choice. The current workaround is to only create those shares in small batches as they are being bought, so a minimum amount of "unissued" shares exist.